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NTA Abhyas 2020

Exam: NTA Abhyas
Year: 2020
Subject: Chemistry
Chapter: Practical Chemistry

NTA Abhyas 2020 · Chemistry · Practical Chemistry

Passing H _ 2 S in to a mixture of Mn^ 2 + , Ni^ 2 + , Cu^ 2 + and...

Passing

{H}_{2}S

in to a mixture of

Mn^{2 +}, Ni^{2 +}, Cu^{2 +}

and

Hg^{2 +}

ions in an acidified aqueous solution precipitates

Options

A $MnS$ and $CuS$
B $CuS$ and $HgS$
C $NiS$ ad $HgS$
D $MnS$ and $NiS$

Correct answer

B. $CuS$ and $HgS$

Step-by-step solution

{H}_{2}S

in presence of aqueous solution precipitates sulphide of

Cu

and

Hg

(IInd group) apart from

\text{P}{\textb^{+ 2}, \text{B}{\texti^{+ 3}, \text{C}{\textd^{+ 2}, \text{A}{\texts^{+ 3}, \text{S}{\textb^{+ 3}

and

\text{S}{\textn^{+ 2}, \text{M}{\textn^{2 +}, \text{N}{\texti^{2 +}

are of IVth group so cannot be precipitated by

{H}_{2}S

.

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